Prince Harry has joined the Queen in photobombing at the Commonwealth Games. Former Olympic boxer Trevor Shailer (front right) was posing with rugby sevens coach Sir Gordon Tietjens at the swimming, not realising that Harry was giving a cheeky thumbs-up in the backgroundTrevor ShailerPrince Harry, Prince William and Kate Middleton watch Scotland play Wales at hockey during the Commonwealth GamesGettyEngland's Adam Gemili reacts after winning the silver medal in the men's 100m final at the 2014 Commonwealth Games in GlasgowReutersLeft: South African swimmer Chad le Clos shows off the gold medal he won in the men's 100m butterfly final at the Commonwealth Games. Right: Bert le Clos cheers as his son wins the goldGettyTwo spectacled bear cubs play at the zoo in Frankfurt, GermanyAFPChildren dressed in Transformers costume pose for photos during the Japanese premiere of Transformers: Age of Extinction in TokyoReutersA man looks at a contaminated river in Wenzhou, Zhejiang province, China. Local environmental protection officers investigating the incident said they found no sign of discharge from factories that line the river, including a paper manufacturer, food colouring company and clothing manufacturerReutersYeoman Sergeant Bob Loughlin walks amongst the art installation "Blood Swept Lands and Seas of Red" marking the anniversary of World War One at the Tower of London. The evolving installation by artist Paul Cummins will be formed of 888,246 ceramic poppies, to honour military fatalities during WWIReutersAnti-government protesters use placards to shield themselves from water cannon spray during President Benigno Aquino's annual State of the Nation address in Manila, PhilippinesGettyA Nepalese Muslim boy offers prayer during Eid al-Fitr celebrations at a mosque in KathmanduReutersMuslim women listen to a speech by an Imam after having their Iftar (breaking of fast) meal on the last day of the holy fasting month of Ramadan in India, at the Jama Masjid (Grand Mosque) in the old quarters of DelhiReutersPalestinian firefighters extinguish fire at a mosque after it was hit in an Israeli air strike in Gaza CityAFPAn Israeli soldier attends the funeral of Liad Lavi, who died after succumbing to wounds he sustained while fighting in GazaReutersAn Israeli soldier prays in his vehicle on the border with the Gaza Strip, as smoke billows in the background from a power plant following overnight Israeli shellingAFPA Palestinian firefighter works during efforts to extinguish a fire at Gaza's main power plant, after it was hit in Israeli shellingReutersFlames and smoke billow from an oil depot where a huge blaze started after a tank containing six million litres of fuel was set ablaze by rocket fire during clashes around Tripoli airport, LibyaAFPA damaged building is pictured after clashes between rival militias in Tripoli. Two rival brigades of former rebels fighting for control of Libyan capital's international airport have pounded each other's positions with Grad rockets, artillery fire and cannons for two weeks, turning the south of the capital into a battlefieldReutersA fire destroys one of China's oldest cathedrals, the Jiangbei Cathedral, built by a French bishop in 1872 in Ningbo, Zhejiang Province GettyAn ancient tower balances on the top of a dirt hill, after erosion at the base of the construction, in Qixian county, Shanxi province, ChinaReutersMedical staff working with Medecins sans Frontieres prepare to take food to patients kept in an isolation area in Kailahun. Sierra Leone now has the highest number of Ebola cases, at 454, surpassing neighbouring Guinea where the outbreak originated in FebruaryReuters